I'm not sure that's A/B testing really... they're asking a question and the question is 'how much would you pay?'. And the way they've phrased it is to include

I'm not sure that's A/B testing really... they're asking a question and the question is 'how much would you pay?'. And the way they've phrased it is to include an example of what it could be worth, and then you can ignore the field (agree with that pricing) or enter your own suggestion. It's A/B testing pricing when they actually offer different prices to person A than person B, right now they're just asking a question and including in the question an expectation setter. It's market research and not something dodgy.