Long RCA interconnects


I need a pretty long run of RCA interconnects to connect my phono preamp to my integrated. About 18 feet long.  What are some options under $400? 
nitewulf
18’ of single ended interconnects is a recipe for terrible hum and noise problems. 6’ is the practical maximum length for a single ended run. Do you have the option of running balanced cable?
You'll want to make a very short run to your phono preamp, and make the long run from that to your integrated.

As @folkfreak says, balanced is best.
Yes, the phono run is short, but the run to integrated has to be long and since both devices are single ended, it can't be balanced, unfortunately.  I'm hoping a shielded cable will hopefully reject interference.