Rigid heddle looms are the cheapest and can be clamped to a table. Looms referred to as 'Table Looms' are more complex and much more expensive.
Ashford rigid heddle looms (made in NZ) are excellent quality and considerably cheaper than the comparable opposition ( Kromski & Schacht, ). You do have to put the smaller Ashford looms together and wax the wood but that's part of what keeps the price down.
Are you looking for a particular size? I started with a 10" and wished I had gone for a 12" because the max weavng width ends up a couple of inches narrower when taken off the loom. I now have a 20" as well.
A good value package is the Ashford complete weaving kit which was round about £200 and includes 2 heddles, 2 shuttles, yarn finishing wax and a carrying bag.
Since Covid? Brexit? UK suppliers seem to have experienced a lot of delays getting kit into the country and stuff is often out of stock.
I have dealt with Weft Blown and George Weil and have had good service from both.