tochsii, the first cart I picked up was a Sumiko BB with 300hrs from a seller on Audiogon. The actual price was pretty good, below the sellers asking price. I liked that BB so much I ordered a brand new BB from a ebay seller located in Hong Kong ($888). The sale was smooth and the cart was perfect. Unfortunately the cantilever got damaged during my relocation.
I sent it off to have it repair but it didn't workout. However the craftsman compted me with a new cart from his personal collection, which I paired with my Pro-Ject TT, awesome cart by the way. Needles to say I sought another BB. Now this cart had 10hrs when I got it from a seller on Audiogon for $500 (Perfect!!).
From eBay I won a Benz Wood H ($350) and a Grado Reference Platinum ($75) both are in excellent condition. I have also picked up items from US Audio Mart.
My recommendation to you is too do your research on the seller (that includes ratings and communication) and to have a little faith.