@no1e_goat You might want to check here for those Polk Speaker Prices.
Home Speakers for Every Space | Stereo, Surround, & Wireless Options. I think it is okay for a room that is 10 X 15 or so. Polk makes good speakers, and the ES series is not so bad, IMO.
The package you have shown from that Merchant, seems like the most I would pay, would be $300 per speaker or $1500.00 Total including shipping. They do list the Polk Speaker Models in the package. Good luck