I'm not really pinching my pennies here, however I may decide to draw the line eventually. The way that their fee structure worked (from the past if I remember it correctly) is that it's a flat 30 cent up-front fee plus 3% of the total. So, if you sent Joe-chipper $10.00 for that lovely $5.00 LE chip in mint condition... then Joe would get $10 less (.30 + .30 = .60) so, his net take on it would be $9.40. For amounts under $5.00 payment, this does get kind of expensive, but if 'Joe' is easily making over $4.00 profit on the chip, then it's really not a big deal is it?
PLUS - you get the FAST delivery of the payment to you rather than having to wait for that check or money order to come in (snail mail). OK, so I'm one of those young "whipper snappers" and I probably had to see the Howdy Doody reruns when I was a kid, but yes I at least Know who Howdy Doody is/was so please give me the benefit of the doubt here. I've happily had my paypal account for over NINE years and have lived with their fee structure.
Finally, another thing to think about: this is a hobby, so we're not in a big RUSH to get that payment. So, most of the time a check or money order would be preferred, and work well, but then that brings up two things:
1. Security - how can you be sure the check you receive is good? If you're getting a check from a non-club member it could bounce.
2. Money orders they send to you: That takes time out of the buyers schedule to drive out of their way to the bank, post office, or grocery store and pick up a money order, then get an envelope, and put a stamp on it and mail it out.

So - there should also be some sort of 'dollar value' on how much is it worth to NOT have to do the above two things? For me, that's a no-brainer. It's worth taking that 60c hit to get the peace of mind that I have the payment quicker, and in my account that much sooner.

Comments? Questions?
Oh, and YES, I also know what a whipper-snapper is too (I looked it up).