It is that time of the year where all the shops will be selling off their used demo/lesson/rental fleets. You can get some great deals if you do not mind a little wear and tear on your boards. These are especially great for beginners who want to get into the sport, you can get a great deal and see how much you use it and then you can always upgrade to a new board on your second purchase. Check out all the shops in MD but here are a few that are having certain days they are selling them off or reservation programs.
Walk on Water- Already started selling them off, check out their shop https://www.facebook.com/WalkOnWaterOC/?fref=ts
Eastern Water sports- They are not selling them till after labor day but you can put a deposit down to hold one https://www.facebook.com/easternwatersports/?fref=ts
Kent Island Sup- Available today https://www.facebook.com/Kent-Island-SUP-Stand-Up-Paddleboards-637343643032679/?fref=ts
East of Maui- Had their sale on Monday but they may have a few left https://www.facebook.com/eastofmaui/?fref=ts
Sup Annapolis- Sunday Sept 4th, over 40 boards will be available. here is more info https://www.facebook.com/events/938896332899967/