I've never seen a sale on that, but typically, you can get a used one for $500 with 2 of the 8 credits used. Their licensing system is pretty effective at keeping prices up. HPTuners Pro is in my future, but probably not until after I do the engine swap. And that won't happen until the end of next year because...
I've been on the phone with Chris @ G-Force Engineering, pestering him with questions about the Strange Engineering S-Trac differential, gear ratios, driveshaft critical speeds, ports for external coolers, and so on. I also wanted to try the Paypal no interest 6-month financing option, which turns out to be a little weirder than I thought--despite having spent over $25,000 over the past 12 years with Paypal and eBay, their starting credit line is a flat $1,500 and they take any attempts to purchase more than that as a credit application for that amount. I was able to get to the shipping screen with no problems, but the G-Force website is goofed up--they have no viable shipping options. And because they're closed over the weekend, it's impossible to order anything from them and receive their Black Friday pricing.
Anyway, I've pretty much settled on the S-Trac package (helical cut gears) with a 3.50 ratio, 4.0" aluminum driveshaft, Pro-Iron case, and two ports for an external cooler. I thought the carbon fiber driveshaft would be the best option here, but after talking to Chris, I don't think that's the case. Although the 3.75" carbon fiber driveshaft has the highest available critical speed (250+ mph), it requires a big, heavy (6 lb) CV joint on the transmission side to allow the driveshaft to plunge. Not only does that obviate any weight advantages of carbon fiber, in my mind, it may also pose clearance problems with 54's shifter. The newer 4.0" driveshaft option is lighter, has an acceptable critical speed (Chris said he'd have to ask Precision Shaft Technologies to run a critical speed calc for this length), and necks down near the transmission to provide additional clearance. Chris further stated that they (G-Force) were a little dubious of the necked design at first, but apparently they've sold a bunch on other platforms and people really like it.
Anyway, I'll probably know more on Monday if Chris gets back to me. I want those critical speed numbers before I pull the trigger, and then there's the question as to whether the Paypal thing will work. If not, then I'll re-prioritize and put the engine back at the top of the list.