alternate air source

I have several used regulators for sale: Scuba Regulators - sporting goods - by owner - sale All items sold "as-is". No reasonable offer refused.

Right now the Internet is positively crawling with numerous offers of what appears to be a "Spare Air" clone complete with tank filling accessories and a hand pump. Interestingly this hand pump is claimed to reach 3000 psi! When I read these adverts my thoughts went to untested cylinders and...