I'm considering buying VIBE on etherdelta, but what I don't understand is the wildly different price of each purchase. Also, why do some people buy at a higher price than the lowest sell order. This doesn't make sense at all.
There is no price matching on EtherDelta.
Let's say the order book looks like this:
9000 @ 0.10
4000 @ 0.09
1000 @ 0.08
You want to buy 5000. On most exchanges you can click on the 0.09 and it will get you the 1000 @ 0.08 and the 4000 @ 0.09. On EtherDelta you'd only get the 4000 @ 0.09, leaving the 1000 @ 0.08 in the order book. That's what I think happens.