I don't think the price of the wand has anything to do with the special effects in the shop. UO has repeatedly mentioned that you don't have to buy anything to partake in the Ollivander's experience. After the process of the wand selecting the customer, they have the option to buy the wand that "chose" them, request a different wand, or not buy anything.
From MTV's coverage:
Even though the Ollivander's shop is technically a shopping experience, actually buying anything in the shop is not a requirement. If a guest goes through a wand-selecting experience, they are not obligated to buy the wand that "chose" them. According to Coup, the experience is as much of a draw to the shop as buying the wands.
But even though it sounds like it should take a while to go through the process, Coup estimated the wand-choosing experience should only take two to five minutes per guest. Since the shop stays true to the books and films, Ollivander's will be very "intimate" — meaning probably only 25 people can fit in at a time. Especially within the first few months of the park opening there will probably be a wait to get into the shop, but it seems like it would be well worth the time.
Coup also acknowledged that not all visitors will want to go through the wand-selecting process and said there are going to be other wand-purchasing options available. There are 13 Ollivander's wand varieties created by the "Harry Potter" films' production designer Stuart Craig and author J.K. Rowling that can be purchased, as well as 12 wands from Noble Collection and a build-a-wand area geared towards younger guests. Visitors can select items to put in the core of the wand and choose the wood to make their own unique wand.