Anyone know where I can sell a white gold ring?

It's 99% certain that all you will get is what is called the melt value; they will not be interested in the ring as a piece of jewellery. A jeweller will weigh the ring and give you what the gold is worth when melted down.
Ask any reputable jeweller anywhere in Belgium and the price is unlikely to vary more than a couple of euros from the next one down the road.

today's price for 9g white gold 14 caret is $218.79 - don't sell yourself cheap!

You'll get the best price at www.sloopgoud.be , of course for a small amount you get the lowest price. And you'll have to count the cost of driving there. But I looked around at a few places (in Antwerp, where the jewelry shops are) even went to see someone recommended by a friend who used to work in that industry. And this place had the best price. I sold all my gold there :))

Does anyone know a place that repairs jewellery ie small repairs ,,,thanks