I think part of it is the costume. I think for a lot of folks, the T2 T-800 is the definitive look, and with a little extra cash you can even make it a Cyberdyne T-800.
This figure, however, isn't necessarily everyone's definitive T1 figure, and the demand is probably a bit lesser. Right now, it's most people who really want this particular look getting it, so it's not a crazy fight to get one yet. Those holding out and hoping for the biker T1 look will probably eventualyl go after this figure for lack of options if HT doesn't come through and at that point, the demand will really go up and those willing to sell or with ones to sell will find themselves in a good place to double and triple their money.
This figure, however, isn't necessarily everyone's definitive T1 figure, and the demand is probably a bit lesser. Right now, it's most people who really want this particular look getting it, so it's not a crazy fight to get one yet. Those holding out and hoping for the biker T1 look will probably eventualyl go after this figure for lack of options if HT doesn't come through and at that point, the demand will really go up and those willing to sell or with ones to sell will find themselves in a good place to double and triple their money.