I use an SL1 for every gig, unless there is an SL3 or SL4 being provided by the venue or promoter. It is still working like a champ after years of abuse.
I just helped my buddy pick one up locally (Boston area) for $200. I’ve seen them range from $150-300 usually, and it’s something that is really solid for the price.
Eventually I plan on investing in an SL4 (as I am beginning to throw shows myself with my crew) but the SL1 is a workhorse that you can still find for a very inexpensive price.