I don't think that you'll see significant increase in sales if any, but almost guarantee that you'll see decrease in monthly income :]
About month ago this guy https://www.cgtrader.com/marvimation announced that he's increasing prices for all his models. I decided to do the same, did go through all my models and increased prices for all of them (for some even by 100%!). Did that worked out? Hell ya, not only november was best month in terms of revenue, but in terms of number of sales too! I'm pretty sure that i won't do mass discounts on my models in the near future, if anything i may increase my prices even little more. I don't think that discounts have big inpact on sales in this business, however quality of products and good presentation really helps a lot.
Anyway, will be interesting to hear your experience after 30 days, although you have choose not the best month to experiment ;] Don't forget to inform us.