Yea
If you are a good customer and are buying an expensive pair. I don't see why they would not allow you to attend one of their pool sessions and try a pair or 2 out.
"Look I'd love to buy these but I don't know if they are right for me; is there anyway I can try them out at one of your pools sessions and maybe try out pair of you other fins also in case these
are not the ones for me".
Well worth it to pay a bit extra over Ebay or LP if you can try them out first.
The other option is to return them as some state laws will allow that and keep swapping fins and paying restocking fees.
One of the reasons for having a good relation with your LDS. The problem arises when your LDS doesn't stock what you want to buy and it becomes a special order and returns are more complicated.
Fins can last a lifetime (with the exception of Mares Volos and those fancy delicate styles) if treated properly and it wise to get what you want the first time.
yes, that is true... thanks!