You can buy from us directly by below link:

https://www.akminer.com/all-products/lyra2rev2-asic-miner-dayun-zig-z1-ship-now-free-shipping-psu-and-power-cable-included

but I can't answer worth it or not, suggest you ask more people here and specially you need ask some people who already use it.

However I thought if some coin is profitable personally I won't tell somebody else because will face a lot of competitors for same coins.