Well, me, being a jobless 16 year old HS student, I try to go for the best deal I could get.
Example, I was looking at a Radeon7500, for about $60, saw a GF2Ti, for $50, was about to pick that up, and decided to hold off, and get myself a DX8 Capable card for a little more.
I saw both a Ti200 and R8500 for $100, so I decided I wanted the R8500, so while saving up, I found a Deal on a Ti200, I got it for $69 shipped, and thats how much I paid for it, and its a great card! Overclocks very well....
I pretty much try to get the best performance to price ratio... So depending on the card, that'll be my price range... I wouldn't like to spend more than $200.