Goodbear66, you are correct. Decent yellow/black stereo's are uncommon. Probably outnumbered by 60's mono's by around 8:1. Whilst copies can be found by unwitting vendors on ebay under £30, copies have sold for figures of £500-£900. Obviously, these are mint/nr mint, and have a rare label or sleeve. In my opinion a decent stereo should be worth at least £100, up to £300. Obviously more if there is a rare aspect to it.
This is a limited edition of 500 copies. Only 150 remain in stock. Order from Apcor to avoid disappointment. Alternatively, message me to secure one of the copies I will have to sell myself.