On a given budget, I like to buy used but relatively recent, to get more for my money.
My late wife was from a family with tradition of buying new, and I let her have that on her car (though sometimes I got her into "demonstraters") but managed to convince her that new was not necessary for houses, RVs, vehicles for me or the kids.
Sometimes you have to buy new to get exactly what you want, when what you want isn't what most other buyers before you found adequate. In RVs, this will be the case when buying higher end, and the concept of value includes a lot more than utility.