I'd say, the older the better. So that would be the top left one. Stay away from the russians. I've got the one in the middle of the upper three. Nice creamy phaser with a vintage touch to it. They pop-up on marktplaats regularly. Another idea could be to check vintage guitar shops or markets. I've already seen quite a few of them at vintage veenendaal for instance along with loads of other nice classic effects.
Kitchen.
Kitchen.