Yup me too. I'd send you a check without concerns. Don't need protection from well intentioned and straightforward folks.
Does lead to some potential issues with people you've never dealt with before though:
• Will you ship before you get payment in hand?
• Will you accept personal checks from strangers and will you then require the check to process before you ship the knife?
• Cool thing about PP is that once the transaction is complete you can rest assured that you've been paid.
• Shipping can happen immediately.
• Also, if you send to the buyers PP address and make your shipping label using PP you save a bit on S&H and PP will support you in the event that the buyer claims the package never arrived.
Seems a small price to pay for the convenience. I'll go either way with you.