Putting that car on a chassis dyno or even just getting it up on a lift won't really tell you much about that Bergman engine - you have to see what's inside of it. Things I have learned about Bernie Bergman's operation:
1. I bought a Bergman 2,110 long block with an Engle 120 cam and "Hot Street" porting. When it was assembled, crankshaft bearing #4 (right in front of the flywheel) got crushed and the engine, once started, seized after 15 minutes of running. I pulled it down and completely rebuilt it. All parts/services I asked for were there, but they should have done a better job porting the MOFOCO 044 heads (I cleaned that up myself), and they should have caught the crushed bearing even by turning it over with a wrench. I was pleased to see the parts used that I contracted for (no used or no-name parts) but I am not especially a fan of his/their workmanship. But, that said, when I was assembling it I cocked a camshaft bearing, didn't see it and crushed it AND damaged the case, which got repaired/machined and then re-assembled without incident. I guess assembly slip-ups happen to all of us and I got to meet some cool Harley-Davidson engine machinists. 
2. If you have Bernie's 911-style fan shroud it eliminates the stock, VW oil cooler tower (no room for it) so you need at least one, and maybe Two heavy duty oil coolers to keep it cool-ish and, even then, for an engine over 2.4 liters, keeping it cool will be marginal. He used to recommend DeRale 16-pass coolers like this:
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and they are totally adequate on a comfortable day, and work well on a hot day, for me, but my engine is a 2,110. Best place to have them mounted for a 2,438 engine is in BOTH rear wheel wells. The hose routing to those twin coolers can be a nightmare but is very do-able.
According to other posters here, that is a 10-ish year old car with only 2,000 miles on it.
Why so few miles? Could it be that it has always run hot and no one cured it for the PO? Kelly Frazer (el Frazoo on here) has a 2,338, although it is not a Bergman engine. He's running a later VW fan and cooling tower plus an external cooler and filter and he has no cooling issues that I am aware of, so it can be done on larger engines. I just wonder how cool THIS engine is on a hot day with a cooling system known on here and on the Samba to be marginal at best. I didn't know that Beck installed Bergman engines, but Carey Hines could comment on that if you contact him.
Other than that, it is a nice, albeit lightly optioned, Beck that is probably worth something way closer to $30K, but the dealer is looking for his $1K - $3K cut, too, so there you go.