Do any of you subscribe to eBay Marketplace Research ?

I had never used it, but I paid the $2.99 for 2 days to see if there had been and Vince Young Topps Rookie Premiere Autos sold lately. It is actually a pretty handy tool, not sure if it would be worth $10 a month. Might be better off paying $3 each time I need it. Do any of you guys subscribe? Do you use it often?
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Comments
It's even more useful when thinking about what to bid on an item that hasn't shown up in a while.
Lee