What do you look for when buying a used table?

Looking to get back into wax...but its been awhile since I've had a table...and posters here really seem to know their "stuff"...what are some key areas to investigate when buying an older,say Thorens table...If you have some specific advice or hints that would be great...also...how much does a "check up" run at most audio shops...I plan on replacing the belt and cartridge...just want to know what other "hidden" cost might be found in a used table..wish me luck! One last thing...cant afford a record cleaner...what is the best,cost-effective way to keep wax clean? Happy Holidays....