Ebay Price tracking application (prototype)

rdg00001 · Jan 29, 2010

I've been toying around with this idea for a while, and thought I'd share now that I have gotten a bit further along with it. Basically, I wrote a little program that tracks the sale of a card on ebay and shows a historic price graph. Right now, I am only tracking a few cards, as this is just for fun, but I wanted to see if anyone has any feedback/comments. Right now, it is tracking the average daily sale price of a handful of cards.

If anyone is interested in taking a look, they can check it out at http://www.baseballcardmanager.com - just enter as a guest!

sportscardtheory · Jan 29, 2010

Could be really cool with some tweaks. Is it only for cards you put in, or can it be used for any card?

rdg00001 · Jan 29, 2010

sportscardtheory said:
Could be really cool with some tweaks. Is it only for cards you put in, or can it be used for any card?

Only for cards I put in right now - easy enough to add new ones though

matfanofold · Jan 29, 2010

Very Cool!

zookerman182 · Jan 29, 2010

so pretty much what i gathered was, every other card sells high and every other card sells low. Cool looking system though

rdg00001 · Jan 29, 2010

zookerman182 said:
so pretty much what i gathered was, every other card sells high and every other card sells low. Cool looking system though

Some of the cards have some inaccurate data in there, as the ebay queries I put in for them were not specific enough. If you focus on the recent onws (Hobgood/Chapman), it is alot more accurate

200lbhockeyplayer · Jan 29, 2010

Just a heads up, to my knowledge, eBay owns all of their auction results data. They also view this data as an asset and sell/license it as such.

"Cease and desist" appears to be common with these types of custom apps.

rdg00001 · Jan 29, 2010

200lbhockeyplayer said:
Just a heads up, to my knowledge, eBay owns all of their auction results data. They also view this data as an asset and sell/license it as such.

"Cease and desist" appears to be common with these types of custom apps.

Yeah - I know - I'd never consider reselling the data - this is more of a fun project that I just play with in my spare time. If ebay says cease and desist, then I certainly will

200lbhockeyplayer · Jan 29, 2010

rdg00001 said:
200lbhockeyplayer said:

Just a heads up, to my knowledge, eBay owns all of their auction results data. They also view this data as an asset and sell/license it as such.

"Cease and desist" appears to be common with these types of custom apps.

Click to expand...

Yeah - I know - I'd never consider reselling the data - this is more of a fun project that I just play with in my spare time. If ebay says cease and desist, then I certainly will

Personal use shouldn't be an issue, but eBay scours the web for projects like this.

It makes sense for them to protect their data, especially because it appears that it should be completely in the public domain.

rdg00001 · Jan 29, 2010

200lbhockeyplayer said:
rdg00001 said:

200lbhockeyplayer said:

Just a heads up, to my knowledge, eBay owns all of their auction results data. They also view this data as an asset and sell/license it as such.

"Cease and desist" appears to be common with these types of custom apps.

Click to expand...

Yeah - I know - I'd never consider reselling the data - this is more of a fun project that I just play with in my spare time. If ebay says cease and desist, then I certainly will

Click to expand...

Personal use shouldn't be an issue, but eBay scours the web for projects like this.

It makes sense for them to protect their data, especially because it appears that it should be completely in the public domain.

Yeah - - plus they charge a fortune for the data. Funny thing is that I built all of this using the public API - just did it in a creative way...

nborton · Jan 29, 2010

Just wondering. Are the spikes caused by differences in grading?

rdg00001 · Jan 29, 2010

nborton said:
Just wondering. Are the spikes caused by differences in grading?

Yeah - for the Markakis and Weiters, there are a few BGS 9.5's and 10's etc that skewed the results. The Hobgoods and Chapmans that I added this week are only looking at raw cards, hence the straighter lines (and more accurate data).

George_Calfas · Jan 29, 2010

I have been doing personal use data mining from ebay since 1999. I have done this solely for 1993 Finest Refractors, using import and some code to get the info into Excel.

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Ebay Price tracking application (prototype)

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