Hi,
I will create a fix for the plugin in the next version of HikaMarket.
When the price is low, HikaMarket ask for a price distribution with too many number after the decimal point and paypal does not like it.
I will make some test and see how have a nice solution.
Regards.
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.