We upped our pricing from $49 to $129 on AppSumo and had our best week ever in terms of sales. However, it was due to something we didn't expect. When we increased our price, AppSumo put a 48 hour "deal expiring" timer on our old price which put us on an Expiring Deals section of the site, which boosted out traffic tremendously. This allowed us to sell about ~$500 in a week.