I've done the $15 shops which are usually at the same locations as the $250 ones, but you just have to ask about credit.
They are interested if you are offered a particular bank's credit offering. If you aren't, you are supposed to ask about it specifically.
I've found some locations offer it as a branded (equipmnet mfg) card and others as a line of credit or loan from that bank. You might have to probe them a bit to see if they offer it as a branded card since they might know it by the card name not the bank that offers the card.
I also don't know if you could use a branded card to buy a chain saw since I don't believe the manufacturer's card I was told about sells them. That company sold lawn tractors, mowers etc. However, I could be wrong.