I found one local for $275.00 Shimano 105 derailers nice paint but seem a little heavy to me. Been searching but cant find what the medium size fits?

I'm 50 and haven't been cycling for over 30yrs. LOL For exercise and some pleasure. I'm riding a 86 GrandPrix now but don't really want it to be a daily bike. I have been looking at the entry level BD bikes as not lots to spend now.

Whats you're honest opinion on the Raleigh. I have always been a Raleigh fan but something about the bike where the top tube isn't straight doesn't do it for me.