Say “I can’t pay for it now” or “I don’t want to pay for it yet” or something then… “I don’t feel like paying for it” has a connotation of “I could pay, but I want it for free” rather than even “I don’t want to pay for it” which can be taken from more viewpoints such as “it’s too expensive right now to justify paying, I’ll wait for it to come on sale” or “I’m not ready to pay for it until I’ve tried it”