Where can I get a good deal on oxygen and acetylene tanks?

NAPA use to have a good deal to rent them, but now they want around $176.99 for the oxy bottle and $194.99 for an acetylene bottle, plus $18.00 to fill the oxy bottle and $44.00 to fill the acetylene bottle. To refill you exchange them for different bottles and just pay the $18.00 and $44.00 dollars. Note: These are mid-size bottles, between the small ones about 2 ft high and the big one around 5 feet high. I would say these are about 3 to 4 feet high.

Is this normal price for these bottles and refills?

Thank you in advance,

RonK