Hello Dogjen,
Don't assume show deals are always the best, some can be, but often if you shop around you can find similar or sometimes better deals elsewhere.
Also factor in the how far the actual seller is located from you as you don't want to suddenly discover you need to take the item back if you have chosen the wrong one.
Warranties can also be a problem, some more local dealers will not handle warranty claims if they did not sell it to you, so if there is a problem with your item, you don't want the inconvenience of having to get it back to seller a long distance away. However, you will have your statutory rights under the Consumer Rights Act which sets out that the seller in your contract must respond if they sell faulty goods.
I advise you read up about the CRA to better understand your rights so you are better prepared before considering a show purchase.
Good luck