Keep in mind here that for the US at least, the NewTek toaster has almost exclusively kept the Amiga alive since C= died. Not until the toaster was put onto a single PCI card (back in the early 2000s) did some toaster users begin to move away.
Sure there have been other apps and products since then but nothing on the scale of toaster support for the Amiga. So, if you are considering buying from a toaster related site as long as they have been around for a while, I wouldn't be too concerned. BUT keep in mind that they focus on toaster apps and cards so may not know much about other Amiga things.
Regards,
Ltstanfo
