They need to drastically lower the starting prices.  With such high starting prices the top row is worthless.  There are usually one or two purchases and then no one touches it.  It's a really predictable pattern.  It's really easy to determine which purchase will net you money, and which will not.  People will slowly stop buying potatoes above a certain threshold, and that threshold will slowly get lower and lower until no one even buys the top potatoes.

The bottom row is not as predictable, but it's still easy to detect patterns.  Again, they need to lower the starting amount on these.  There should be one or two potatoes where someone can get in without much of an investment.  I would love to see a potato which increments a fixed amount (maybe 1 LTC) but has a quick time.