Yup, if they're selling you a "part" to take home after they're done, they're selling you the SERT.
If all you are wanting done is something like a stage 1 flash, they should have the "canned" MAP programs that come on a disposable one time use gadgets much cheaper. The downside is that these canned maps aren't tweakable on the dyno, but for a Stage 1 it should be fine.
'05 Carbed Night Train
111 rwhp, 112 rwtq
Best 1/4 ET 12.557s
Best 1/4 MPH 108.59