HT for little money…

Hi, would like to do an experiment soon… have a 10cm midrange driver from a 3 way system lying around and I would like to buy a cheap HT and make a soft tinkering and then build a small “monitorbox” from everything… to MT I can say a lot, is en DLS from the current 3 way system… soft I build myself bwz. try several variations…but suggestions you can still make 2 x tweeter together max. 60-80 euro… can also make more expensive suggestions make that I can then look needed at ebay… to sound, well, he should just inspire me a little bit for the money