Since the 6350q is a rare and desirable model, mint condition examples can fetch $500 or more. It's a good table but not that good.
So, you have another option: sell it and buy something more modern. In fact, assuming the table was in great shape, you could probably take the profits and buy a nice used integrated amp from Rega, NAD, Rotel, Cambridge, Arcam or others to upgrade your Yamaha, and still have a few hundred left over for a used Rega, Pro-Ject, Music Hall or similar turntable. Then sell the Yamaha and use the money for a cartridge upgrade.
My guess is you'd do better on eBay than Audiogon with this particular item.
So, you have another option: sell it and buy something more modern. In fact, assuming the table was in great shape, you could probably take the profits and buy a nice used integrated amp from Rega, NAD, Rotel, Cambridge, Arcam or others to upgrade your Yamaha, and still have a few hundred left over for a used Rega, Pro-Ject, Music Hall or similar turntable. Then sell the Yamaha and use the money for a cartridge upgrade.
My guess is you'd do better on eBay than Audiogon with this particular item.