Nope. I enjoy the building part, I certainly wouldn’t want to pay extra money for being denied the pleasure.
Last time I bought a full bike, I knew the frame I wanted, but was flexible on bits. I had to be to get the bike in under a hard budget.
One place said they’d need to supply it built, build cost would be £140 on top of the bits
Didn’t go with them. Found somewhere else, gave them a list of components, stuff I had in my parts bin, stuff that was half price on line elsewhere, stuff I hoping they’d get me in exchange for my £1K letter. They fitted me up on the jig to advise on the right size frame and stem, checked my spoke calcs, ordered everything in and sent me off with the lot, plus a cheery good luck and asked me to come back and show them when I had it built.
And when I did they made all the right noises and told me to put an extra turn on all the spokes.
Perfect bike shop service, everything I wanted, nothing I didn’t, enthusiastic, knowledgable service.
Condor, good shop!