When I ordered mine a couple years ago there wasn't much difference anywhere. I got mine from CJ Pony parts looked for coupon codes. The trick I used you can get 5% coupons and free shipping, then you also get points ($1=1 point) every 100 gets you $5 back so you split up the order.
Couldn't really do much better at the time maybe a retailer on here will work with you if you call but it seemed like there was a minimum advertised price.
I bought my FX1 Pros from thmotorsports.com with a 10% of discount code (found it by googling) and free shipping. I forget the total cost but it was $30-40 cheaper than everywhere else.