An import and export function would be just great.

Thus one might export a range of items, add some more item numbers (e.g. from an ebay search), assign a certain price and/or group for all of them and import them again.

Import/export could be a most simple plain text format, e.g. separated by tabs, containing the basic info such as item id, title, seller, bid, group, end time, bid time offset.

Import might be either as an addon or replacing previous items.

Export should be just the same so that an edit could be done e.g. via Excel, simple text editors etc.

Agree.
I have a similar feature in Windows based application (Save as - XML File), but due to a very low demand I did not implement Import and decided not to do it for the Web based version.
However, I kept it in ToDo list anyway, but assigned a lower priority on it.
Thank for such detailed suggestion and reminding about that. "adding/replacing" is a good option which I should consider.

Thanks for the quick reply. Please give it a bonus point for the order of importance ranking

I suppose that the watchlist import was much more complicated. Unfortunately this is one-way only.

I hope that import/export as .txt would be a task much easier to add.

Thanks Again!

I agree. I would love to be able to export the data into Excel. Thanks for the discussion!

Ok, I'll see what I can do.