Game shops will typically buy any card thats worth more than 50 cents or so, but theyre going to offer something called buylist prices. These are considerably cheaper prices than what they sell, so youre going to take a 10-20% hit on the value of your cards if you go this route
While this part of the game goes underutilized by casual players, proper side deck patterns are important to winning high level events like Regionals or World Championships
Swoobat's abilities are unrelated to sound, however, with Unaware and Klutz affecting damage and item usage instead
Pokemon Trading Card Game XY BREAKthrough Uncommon Skyla #148 Company: Pokemon USA Series: XY BREAKthrough Item Type: Single Card Brand: Pokemon Release Date: November 4, 2015 UPC: 643690298496 Stock #: 111552 Our Guarantees to You, Our Valued Customer
With Pokemon, you can pretty much just buy a recent league deck and the latest boosters and you should be good to go until a few rotations down the road when those cards arent viable anymore