Recertifying nitrous bottles?

Bottles are recertified (and a really old flea-market 5-lb CO2 extinguisher too, had it recharged once it passed). Just have to go pick them up tomorrow :)

Now... what are people paying for nitrous oxide these days? There is only one speed shop in my town and they want $75.00 to fill each 10-lb bottle! :mad:

I know prices have gone up since the last time I paid $35 (admittedly 25 years ago) but that seems awfully high. :realcrazy:

And the local Airgas will only sell me a 50 lb bottle, even though the corporate website says they will refill cylinders as small as 6 lb. :icon_fU: