What Kind of Paintball Gun Do I Have and Should i keep It?

My Brother Has This Paintball Gun And He Doesnt Play Anymore He is 21 And He Stopped 9 Years Ago But He Has This Gun That Is Metallic Blue and It Says E Marker on Both Sides and You Put The hopper On Top of The Gun and The Co2 Goes on The Bottom ( Or Nitrogen) I Dont Know. Its Pretty Small Without The Barrel, My brother Thinks Its a Spyder but Isnt Sure. If You Know What it IS Please Tell Me, Also Tell Me If I Should Sell it And If I Do What Gun Should i Get Instead, I Played m First Time Today And Im Really Good, Mostly Wood Ball. Thanks! (Btw What Are Some Good Non Expensive Paint To Buy That Are Good and High Quality) Thanks! Choosing Best Answer in 30 Minutes