Most likely repops of the original molds - especially if they're old moldings. I haven't been too impressed with Revell lately except for their newer stuff (Revell of Germany)

Revell has a habit of repopping old Monogram kits as pure garbage. Revel bought out all of Monogram original molds and releasing them under the Revell badge. I tend to stay far away from them after the repop of the original Black Widow kit. Ended up tossing that POS. Never again.