it seems that buying ardor with nxt is quite cheaper.
for 1000 ardor, u need 280 nxt (rate 0.2797). the current nxt price is 0.09$ in bittrex.
Wrong math, bro. For 1000 ardor at the rate specified you need as much as ~2800 NXT. But indeed, ARDR is currently very cheap compared to that value where it should be.