Every moving part (and a few that don't move) on the brown marble are replaceable. Check this site and also you can do a search for Tornado foosball parts and find other dealers on the web that sell replacement parts. Bring a pricelist with you and that will allow you to tally up what you would need to put into the table to bring it up to snuff. Some items are cheap to replace (men, handles, bearings, bumpers) while others are more costly (rods). That said, having to replace a lot of the cheap items can certainly add up. Deal killers, in my opinion, are water damage (look for swelled wood, bowed or split laminate), "blown-out" goals (chipped out laminate and wood around the goals) and warped playfield.
Many coin-ops are bought for home use so not necessarily a bar table. And $950 is WAY too high :-)
Kevin