Should I delete 250 old items?

Sales are all time low on all the envato sites. I have 280 plus items on Graphic river and most of the sales coming from new items. I am thinking about deleting the items and uploading them on other sites as there is no chance of getting any sale from those items now. Should I delete them or is it not allowed by Envato?

Whether you should delete them is up to you, but there’s nothing stopping you from doing so. When they’re no longer on the site, you’re welcome to upload them elsewhere.