A friend of mine had a quote from Betta Living and got an initial cost price of ~£26,000 list price!!! But could have the kitchen for around £10,000!!! The kitchen was a 'basic' U shaped kitchen, no frills.
So, I went with him around a few stores and got some online prices and got some like for like quotes for an oak kitchen. Before buying, it really does pay to shop around! The kitchen spec was a 14 unit kitchen, plinths, cornice, handles and laminate worktop.
Here are the quotes that we got. Companies will say that their kitchen is better than the others because of X, and that is why theirs costs a little more but the differences really are minor. But, that is for you to look at and decide.
Price for a Solid Oak Kitchen (S=Sale price).
Betta Living: ~£10,000 (S)
B&Q: ~£3,600 (S)
DIY Kitchens: ~£3,200
Homebase: ~£4,500 (S)
Howdens: ~£5,000 (S)
Magnet: ~£4,900 (S)
Wickes: ~£4,500 (S)
Wren Living: ~£4,600 (S)
Units Online: ~£3,360
I hope this helps!