Be prepared to spend no less that $20 on shipping costs (and this is going very very low) depending on which courier will be used but I think USABox charges at least $50+ for international deliveries for all their couriers.
According to my investigation for online shopping (since I'm also looking to purchase something soon), eBay may not be a very reliable source for shopping as I discovered from hours of sifting the net because of the high rate of ripoffs that occur on it.
I therefore suggest that you also go through Amazon Online. Not as many ripoffs there but you can never be too careful so just beware of scams and utilize their tracking services like you are paranoid as there's always a margin of something going wrong or an unforeseen shipping delay happening or something like that.
ZIMRA has a downloadable catalog for their rates and the amount varies depending on what you are importing, number of goods being imported, and the reason for you importing i.e. Will it/they be for personal use or resale etc.