This is an interesting question. The way I would approach this is by creating a 'sales' page which appears as a 'sale' but actually it is where you are testing

This is an interesting question. The way I would approach this is by creating a 'sales' page which appears as a 'sale' but actually it is where you are testing your particular price point to see which brings in more conversations. For instance you can have this "sales" option to load randomly for various users, with different options to test specific price points - and then you give them a different amount of discount (this discount ends up giving the user the price points that you are A/B testing) Furthermore, to ensure that you avoid any legal lawsuit I would specifically state that that you will honour a lower price price if they find it elsewhere. So if one customer buys it for $50 but another for $40 and they find out, you can just give them the difference. I'd like to say this isn't legal advice and that I recommend you checking this out from a legal standpoint before implementing but could be the solution to A/B testing pricing points.