You might want to look at chronoexpert.co.uk – they have a variety of watches, including some rare vintage pieces. It could help you understand the market value or even find inspiration if you consider expanding your collection.
That Women's Omega De Ville from the 60s sounds like a great find! Vintage watches like that have so much character and history, and Omega is known for its quality and timeless designs. At £135, it seems like a pretty good deal, especially if it's in decent condition.