I've got several of the Monovalle 1/48 F-102A kits, It's a good kit and still the only Century series not redone by an upstart company (Chinese). Trumpeter has redone The F-100 and seems to have done well with the C, D, and F models and also the F-106A nd B (the sexest fighter to fly the skies), their sister (Hobby Boss) did the F-105D and F (no one seems to want to do the B), Kitty Hawk (spit, spit , Gawg, puke) came out with a simile of the Voodoo and Hasegawa and others have done the 104. That leave Monogram (I've always hated that they went with the Revell name as Monogram put out quality kit) with the 102. AND nobody does and injected molded 102B (TF-102A).
Having gone off on a tangent, the prices listed sound pretty good but I've never heard of Ollies.