Scared Silly
Contributor
First, lets look at the price of used 6061 cylinder, that is in hydro and approximately 10 years old, with a std Sherwood 5000 Yoke valve. I would say around $75-$100 is the going price. So the seller is over priced to start with.
Given they are 6351 cylinders the seller probably does not know about this:
http://hazmat.dot.gov/pubs/reports/cylinder/3al_advisory.pdf
or this:
http://a257.g.akamaitech.net/7/257/2422/01jan20061800/edocket.access.gpo.gov/2006/pdf/E6-14255.pdf
Which as folks have said lowers the price even more. In some places they are worth scrap, others it is getting to be crap shoot. Personally I own a LP CO2 from 6351 it is not subject to SLC but I still have it tested for it at requal. Me I would let the seller know that you are passing on the deal and let them know why.
Given they are 6351 cylinders the seller probably does not know about this:
http://hazmat.dot.gov/pubs/reports/cylinder/3al_advisory.pdf
or this:
http://a257.g.akamaitech.net/7/257/2422/01jan20061800/edocket.access.gpo.gov/2006/pdf/E6-14255.pdf
Which as folks have said lowers the price even more. In some places they are worth scrap, others it is getting to be crap shoot. Personally I own a LP CO2 from 6351 it is not subject to SLC but I still have it tested for it at requal. Me I would let the seller know that you are passing on the deal and let them know why.