When Selling to the Vendor get message "Item is Unsellable" even though it goes ahead and acts like it is sold. If bought back it Says "Invalid Artifact"Also, are all items supposed to have defense and Attack values? Only Items I've seen with these stats are the Starter Items.
Thanks for the feedback, we are already aware of this issue, and I have added this to our bug tracker. We'll try and fix this ASAP.
In the meantime, you can try verify game integrity via Steam and making sure you are using the newest, v0.1.2 build (Main menu, bottom right corner).