Good vaporizers worth the retail value

Long time lurker, first time poster. Looking to buy a vape (I know I know, spare me the bullshit) because I'm required to be in dorms and my uni is super strict on trees. Same problem this summer in a different dorm, so I bought one online because it was cheaper/apparently nicer. Had great reviews but was shitty quality and lasted all of one week. Any known smaller vapes (I.e Pax or Flight Box) that are worth retail value and work well//last?

TL;DR Uni is strict, need a vape for trees. Looking for cheap and efficient.