Old tapes bought off ebay I know this is an older thread but will chime in here. I recently bought 20 BSAF tapes in their hard shell cases with 1960's, early 1970 country music on them off of ebay. I paid $2.50 a tape. I fast forward them and using a soft damp cloth, checked them for how much residue came off of them. Only had one of them with white substance coming off of them. The tapes didn't smell vinegary either. I recorded on one of them and it played back good. I think they are LF35 or something like that. It is so much a hit or miss when buying used tape. Actually the seller had two 20 BASF tape sales. I could only afford one of them. Oh, here's a question. Should one erase a tape before recording over it or is it okay to just record over it? Which is best?