Thus far, I haven't had much luck with scope list/eurooptic.
For the items I've wanted, their listed price was always higher than many other sites, so their perspective discounts were not as good. Granted, when it comes to large retailers, I push for the biggest discount/lowest price I can get. So I never end up going with the same vendor every time, as each one can do different things on different products at different times. However, I've never had scope list or euro come close to anything I wanted at a given time.
I admittingly take a hard line with scope list. I always offer 20% less than they are advertising and won't settle for anything less. They advertised it, so that's what I go with ( I know it says up to ). I've made probably 10 offers, all at exactly 20% lower than their advertised price, and they have never even come close to the 20% on a counter offer.
I have had good luck with optics planet (with their vip discount and a 13% code, they had USO B-10's for about $1399, I should have jumped on that, as they have raised the pricing already), and with Sport Optics.
I'm sure I'll keep trying scope list, but until I actually get something worthwhile at 20%, I won't hold my breath.
(full disclosure, I qualify for mil/le, so the brands like Leupold and Vortex that offer substantial discounts, I typically don't look at on most retail sites as they can't match the price, or if they do, they won't discount any further, which is perfectly understandable. So this absolutely skews my experiences)