2nd Job

A couple of days ago I was in a computer shop with a friend of mine. It's a very well-known shop here in Tripoli, Golden Adler, which I think is supposed to mean "Golden Eagle". Anyway, I was there to look at the graphics cards that they have in the shop, I didn't find what I wanted. Before I got out of the shop I saw a "Job Vacancy" ad posted infront of the counter. It said "Salesman and Computer Technician Needed".
I thought about it, if it's possible to work there as a single "shift", say from 6pm till 10pm, that would fit nicely in my average day. So I might give them a call later today and ask what is the schedule they're aiming to fill.
I worked BOTH jobs - Techie & salesman- for 2 years, and I was real good at both :) so I know I have the experience. But the question is the time, most shops want guys who are available all day, and I simply can't do that as I already have a very good "primary" job. I just like the idea of working with computers again, and ofcourse I won't say that I mind having the extra ca$h ;D !