You will not get a whole system from Walmart for 350 bucks .

My set up and cost and sounds amazing I can bang out rap with bass or have light kicks with the country music

good pioneer head unit 100 to 150
Kicker front door speakers 85
Alpine S rears I paid 30 retail in store 60 ish
12 inch kicker L3 truck box retail 250 I paid 125
Polk audio 800 w mono amp retail 250 I paid 125

Personally if I could change it id go with a bass inferno 1000w
2 kicker 10 inch l3s
And all around kicker door speakers
Retail for that set up probably 600 plus instal at 70 bucks an hour

Go on Craigslist people can't give car audio away, trust me I've tried

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1993 Ranger XLT
4.0L rmp reman
4x4 5 speed
5.5 inch superlift suspension
33 inch goodyear wrangler duratrax
One bad ass audio system