I really understand where you are coming from, Erica. There are too many assumptions made about age; if a young fellow sees an age of 55, and he has a 'gramma' fetish, he may very well be disappointed to arrive at the session and not be greeted with fine lines, crows feet, and grey hair, and a fellow in his 70s might see 55 as young, but, if she has aged quickly, and poorly, then he might be disappointed. So many variables.
Age is more of an attitude thing, eh? Like, I have seen men and women who seemed (and often, as a result looked) older than they were due to their attitude towards life, (and booze and drugs don't help) and I've met men and women who I couldn't believe were as old as they said because they were happy, and with that, full of energy, sense of humour etc.
Age is more of a decade thing, it takes about a decade to get into the age...each decade unwraps a new attitude towards life. I love my decade; I love the carefree, not bogged down, feeling. I don't look at every date with the mindset of "...is this gonna be the one? Have I met my soul mate?"
I usually scope out the territory and wonder, if he is young "is he too fidgety and will I have to tie his hands down so I can enjoy his cock at my leisure?", or, if he is older "Does that belly mean he has abused the booze and cigs so much I might need to splint it so it doesn't bend in half trying to get it in?"... but, there are young guys who are very mature in bed, and there are old guys who haven't learned a thing in all their years, and need their hands tied down.
I always preferred older men, but, sadly, when cruising through the dating sites you can see that most of 'em aren't in great physical shape and that translates into poor stamina, so, when the young'uns send out the invitations it does get tempting.
Enough rambling...Erica, you are sure to get your target market, which is, a guy who wants that 'decade' and isn't gonna freak about a year or two either side of the coin...so, if you put 48 and he automatically adds 5 years...no biggie..there's little difference looking in the mirror in a five year period, and the kind of person who agonizes over that isn't someone who would be fun in bed...cause, they would agonize over all the little things...