Oh. Well if you have the #'s, one of my filters cost 48$ at Napa, compared to 23$ at that site.
How much is shipping from that site? That might eat up most of your savings. Is there a fleet supply warehouse in your area?
I buy most of my parts from Fleet Products. Here are some Wix air filters I recently purchased.
#57750 List $26.70 My cost $8.64 Oops, that's an oil filter
#46761 List $121.65 My cost $39.32
#46766 List $58.75 My cost $18.99
#46553 List $58.98 My cost $19.07
#42253 List $109.62 My cost $35.44
#51602 List $13.32 My cost $4.30
#42126 List $46.50 My cost $15.03