Appx street costs of a new 10lb tank is $340 for basic package, $380 for package A and $450 for package B. Of course, these are street costs at the cheapest places around. If you buy from a reputable dealer, the prices may be a little over that, plus shipping, etc.
I'm looking at a basic package right now, but am also considering a compressor with a 2-gal storage tank as a viable option.
2018 JL Rubicon Unlimited, 6-speed, White
1985 CJ-7, 4-speed, 258 I-6, 3" Springs, 33" BFG AT, Gunmental Gray