Congratulations on your purchase. The price paid seems consistent with most current Gunbroker sales. Features such as vintage magazines and the Intratec carry case do drive the price up somewhat.
I have a Scorpion (the first name that Intratec used) and a Sport 22 (the third name used); and, FWIW, Tec-22 was the intermediate naming of the same basic model. To me the biggest difference is the Scorpion and Tec-22 named models had the threaded barrel (which as noted in a post above is 1/2-20, once a common muzzle thread for the .22LR). The Sport 22 deleted the threads to be AWB compliant.
The book "The Terrifying Three" by Duncan Long includes a section on the Intratec .22LR pistols. The fire control group (FCG) is very similar to that of the AR-7 rifle (and its derivative Charter Arms Explorer II .22LR pistol) except the Intratec FCG is contained in a module. The trigger and hammer share a common spring. The spring has to be rather stiff or else the hammer tends to out run the disconnector and burst fire results. This tendency was discovered in the development of the AR-7 and rediscovered when Intratec first introduced their Scorpion .22LR pistol which prompted the recall noted above. As the combination spring is stiff; like the AR-7, the Intractec .22LR pistols are generally picky about ammo. Also, the need for "powerful" ammo is due, at least in part, to the barrel being only 4" long. Mine run best on ammo such as CCI MiniMag 40 gr., round nose, copper coated, and the like; and will not run on some subsonic ammo or 31 gr. ammo.
A worn extractor is a common problem leading to poor function, and is easily fixed as the extractor (like the magazines) is the same as for a Ruger 10/22. I did have to replace the worn extractor on the Scorpion.
I've mostly done off hand shooting, and the accuracy has been acceptable - comparable to the AR-15 pistol with 4.5" barrel with open sights. With the .22LR suppressor I have and CCI SV, 40 gr. ammo, the noise reduction on the Scorpion (using a 1/2-20 to 1/2-28 adapter) was also comparable to that of the AR-15 pistol with 4.5" barrel.
Enjoy your Intratec .22LR pistol.
MHO, YMMV, etc., and be well.