Add sales screenshots for accurate reviews/pricing

I noticed there are some games that for various reasons have inaccurate prices listed, especially in the CIB category.

Unfortunately, sales for some rarer games are not frequent enough to make data reliable (i.e. there's not much historical data and it's not reportable anymore), so the final average price is not so much reliable.

For this reason, prices should be reportable even after 90 days are passed, i.e. after eBay removes the auction from their website.A solution may be to simply attach an automated screenshot of the auction page to the price record. Users will be able to review the price even after eBay removes the auction.