My first question is how much do you know about PID's?
You might want to do a "PID" search here, there is lots of info, ...the reason I asked the question is there was another member here that bought a Chinese PID and the instructions were useless to him because they were written in Chinese, sooo..., if you know your way around PID then it might be a good deal, you will also need a heat sink, junction block, a box to mount it in, ...what's the warranty policy?
I bough mine and everything I needed from Aubers Instruments, the have an excellent customer service and can answer any questions you might have, ...if this is your first venture into the world of PID.
Here's the link, they have PID controllers just for smokers, ...but they cost more.
Here is a good link, I used it for my installation:
I hope that helps, keep us posted with what you decide,