Teman Bikes - Advice / Thoughts

Couple of thoughts.

531 frames are not particularly heavy. Certainly my 531 from the eighties is lighter than my surly cross check, so I wouldn't get hung up on weight issues.

If you are looking for a new bike at your budget I think decathlon own brand is the best your are going to do.

S

531c steel frames are not heavy at all
one of my lightest bikes is a 1980's gazelle 531c frame and forks
it's not as bad as you think