Did some searching, couldn't find an answer, hope this is the right place for this question. I'm trying to show a non-technical friend how great concentrates are. NO WAY she could handle a rig/torch combo. So then I thought of a pen. Seems like people get pretty good results/longevity with concentrates like wax and shatter. I think it would work well for her. She's a daily user, with a low/medium tolerance. What's a good inexpensive setup from ebay or fasttech?