Hi HS… Yes, to buy a camera in Gib is a good bet. Although be aware that if there is a guarantee issue you may have to ‘return to base’ (no problem if you go there regularly).
I know the Carlos store quite well (have shopped there for various items over the years).
Infact, you will find many of the small stores in Main street are connected to various others, but that shouldn’t stop you having a haggle.
I bought my Canon 350D slr a few years back. Don’t know if it was worth the extra money in hindsight to reject the standard zoom lense that came as part of the package. I allowed myself to be talked into the Sigma 15-80mm lense as the shop assistant told me it was better all round.
Remember there is a limit on tax free goods and you are supposed to declare anything over ?200? (check - someone here may know).
Good luck. Great place to buy!