Suggestions on which dot sight to buy

Would like to get suggestions on which dot sight to buy for a pellet pistol up to 10-20 yards for plinking (non-competition). Not the laser dot projected out to the target but the one that is built in the sight itself. I know that the "See All Open Sights" are good, but do not want to spend $99. At the same time the Chinese Ebay ones may be just a gimmick. Anything in between? It would be a plus if could be used with a rifle too. 

https://seeallopensight.com/

https://www.ebay.com/itm/Tactical-Reflex-Sight-Red-Dot-Sight-Scope-Wide-11mm-View-Airgun-Rail-Mounts-TK/202463445720