Is there a set limit to how many items can be exported to CSV in one go? I'm trying to export all of my items, but I get an empty response. If I export just a few items it works fine.
No more, there was a problem with the script. Please clear your cache and try again. I tested it with your items and it worked fine now 
A user manual for the csv import/export feature will follow.You have a slight price problem, and I've been seeing it for a while now.
Take this listing as an example: https://www.bitmit.net/en/item/18432-silver-cuff-links-1131
The price I have set for that listing is 6.99 USD, but it's displayed as 7.00 USD on the item page (and in search results). It's saved as 7.00 USD if I export it as a CSV as well. I assume there's some price conversion going on that's causing this problem.