Agreed! If you're rebuilding it to wear, that's different; if it's a little big, maybe some foam in the sweatband to size it down. Whippets in slightly larger sizes like that do tend to be desirable, so it might be worth holding on to without a major renovation just to see a) if you can find one closer to your size for a reasonable amount; b) if you can trade to someone who has a smaller size and wants to size up; or c) if the market will offer you a good price.
Strats and Whippets are popular now, but markets shrink and grow.
A
The prices seem to change from one day to the next, some have original boxes and pins and some do not...hard to figure it all out...just go with what you can afford and like.