Where Can I Buy Used Tablecloths?

I would call some linen stores in your local area. I would think after they have been used for different catering events they'd off load some. also, check w/ restaurants to find out if they have any you could purchase at a discount price pr of they can recommend a business they deal with. :)

I don't know where you live, but I think some cities have restaurant supply houses; don't know whether they sell them used.

Also, you could probably rent them.