Hi Andrew and Michelle, and welcome to this fantastic forum.
We have recently bought a lovely apartment in Calis, and like you, were very worried about the agent we would buy from. Lagoon estates were highly recommended to us by people we spoke to whilst on holiday last year, but we eventually bought through Mete and Golden Moon Estates, who have been fantastic - just so kind and helpful. Its all been really quick, and we are thrilled to have received an email last week to let us know that our Tapu is ready. Just can't wait to come out in March to sort out the final bits and pieces!
Good luck - its so exciting, but also very nerve-racking. It's certainly the best thing we have ever done and we have no regrets at all - other than we wish we could spend loads more time in Turkey - maybe in the future! We had to downsize in the UK to enable us to buy, but I still feel as if we have won the lottery every time I look at our photos of the apartment!
All the best, Julie