It's not utterly ridiculous in 4x5 (nothing like Kodak C41!) B&H has Acros for $45.95 for 20 sheets - $2.30 a sheet. Since you say you like Delta 100, it's $32.95 for 20 sheets, $1.65 per sheet, or $104.11 for 100 sheets, $1.04 per sheet. Quite a difference if you buy the big box of Delta, not as bad (but still significantly more) compared to the similar sized box of Delta.
Originally Posted by StoneNYC
FP4+ is $28.95/25 or $101.18/100
and TMX is $82.95 for 50 sheets, which is actually still slightly less than the Acros but close enough to being the same price.