Need Some Help on a New Gun Fill Whip

Mine just started to leak. Teflon tape and tightening did not fix it. I need a replacement whip. I see one from a forum sponsor that sells for about $100. Looking on line and Amazon I see a similar, but not as good as the one I have , in the $30 range. The claim is it's rated for 4500 PSI. I never do that. Am I dense in wanting to save about $75 and not getting the high priced model? I just don't know how much fluff and over engineering is involved in the higher priced fill whip. I know how dangerous HP air is. Run my own compressor and have done lots of SCUBA . I won't do unsafe stuff but am really wondering for this application is it necessary to spend the extra $$ on the higher priced product?