I figured up what this list of gear would cost new (something you can easily do using Google) and it comes to around $1200-$1400.
Yes, it looks like some useful stuff.
Assuming everything works as it should, and if you can get it for a low enough price (only you and the seller can figure that out), have at it.
(My psychic powers tell me the Reserve price is around $850.)
BTW, the seller said something that struck me as ODD...
"We are selling this because after much deliberation the decision has been made to go completely wireless, but this kit is absolutely perfect for the filmmaker that wants a versatile system and quality audio but doesn't want to break the bank."
There is no reason this gear could not be used to feed a wireless transmitter.
But I'm guessing by "wireless" he means to say "wireless lavaliere body mics" (requiring no boom operator.)