Thanks for your reply.
As I stated, most estate agents charge a commission of around 2% (but probably with VAT on top). On a sale of �130,000, that's �2600 + VAT = �3055. So you're already looking at paying more than �3000.
However, as I also stated, there are some estate agents who will sell your property on a flat fee basis. That might be �1500 plus VAT = �1762.50. (That's quite a big difference and why I suggested shopping around when selecting an estate agent).
Those fees aren't 'up front'. You'll only receive the bill after the house is sold. However, it's got nothing to do with your mortgage (on either property). Using an estate agent is just like using a builder or a plumber. You receive a service and you get a bill.
You're not obliged to arrange the survey for the Home Information Pack through the estate agent. (Although most people probably do so). However, whether you arrange the survey yourself, or get the estate agent to do it for you, the bill will normally become payable as soon as the survey is carried out.
A solicitor's fees for selling a house might well be slightly lower than those for buying it. When you buy a house, a solicitor will carry out a 'search' and then deal with any problems which might arise from it. This procedure is not required when selling, so the fee ought to be lower. (However, I still recommend using the services of a licensed conveyancer, for both buying and selling. The service will be at least as good, and probably better, as well as much cheaper).
Your original question related only to 'selling' but your secondary post asks about 'moving'. If you're both selling and buying, it's hard to see how you could spend less than �3000 (unless you sell without an estate agent, as I did, and/or do the legal work yourself). You've got the estate agent's fees, plus the HIP fees, plus two lots of legal fees, plus a survey on the