OK Bobo, it looks to me asthough you really do want a bike
I currently have a Raleigh LUXE 531c 57cm BB - toptube centres. 10mm bigger than you're looking for, but if your leg length is 29-30 inches inside then a 57cm will be absolutely fine. You won't have to drop the saddle onto the toptube (crossbar) to ride it.
I only acquired it recently (2 weeks ago). It has served its purpose for what I bought it for. (some parts). As she stands she is in very good condition as a "rider". This means she has the odd scrape and decal loss, but, she is a remarkabley smooth ride, effortless to get going.
I had some one interested in her, but that is only a maybe.
Proposition: I will re-build the bike to a high Campagnolo specification, re-work the paint work back to NOS standards for your budget OR you can take her as she is fitted mainly with period correct Shimano 600 and Shimano 105 parts. She is here, already to ride, just needs a bum & some legs to get the best out of her.
I make the propostion incase you desire something "already made/restored". I can equally source the missing Shimano 600 parts and rework the paint & decals. I shall post you some pics if you like the sound of having her as is OR rebuilt for you back to her original state OR campagnolo throughout. Either brands will be stunning when complete.
The paint job I have in mind would be to restore her original colours, perhaps with the join lines being solid not fade. Just make the odd tweak to bring her colours up to date. You'd never know I'd been there. Original 531c decals will remain in place untouched (the paint in these areas is 100% OK) . When done, a full 3 coat & polished lacquer will make her like new again. Some new large Raleigh Decals for the top tube is all that is necessary.
This should give you something to think about
My best to you Bobo, yours Laz.
PS: a discussion I held about her can be found here http://www.retrobike.co.uk/forum/viewtopic.php?t=167738