Edit: It was a little late but Newegg created a page to better organize the discounted items. New link below.
If an item is discounted, it will show in red text below the item title. Example:
"+ 20% off w/ promo code OPENBX331TWENTY, limited offer"
- out of stock
HP Ex920 ssd 1TB for $102 shipped
ASUS ROG Strix X399-E Motherboard $240
Many examples, but these 2 seem to have several in stock