Taxes in Lithuania on private sales on Ebay or Amazon

Hi. I occasionally sell items of my collection (private hobby) on Ebay, so my question is what limits & rules are applied in Lithuania for non business related sale activities on platforms like Ebay. I recently sold a few items and gained above a few 1000 EUR, but I am not doing this commercially or regularly.

Ebay and other platforms are now forced to report sale activities under the new DAC7 to the tax authorities (More about the topic: https://www.pwc.com/lt/lt/apie-mus/naujienos/dac7-direktyva-ka-apie-prekiaujancius-per-e-platformas-suzinos-vmi.html)

Where can I find more infos und taxation and what regulations apply? Ačiū!