To reinforce what is said about how a shotgun serves as a multipurpose platform...
I recently got a Remington 870 SPS-T from Gander Mountain for $299.97; the SPS-T is a monicker for Special Purpose Shotgun-Turkey; it came with matte finish, black synthetic furniture, sling mounts, 22" barrel with Hi Viz sights (fully adjustable on rear), sling, extra-full extended choke, 2 keys for integrated lock, paperwork, etc.;
I bought several used Remington chokes for $10 each--improved cylinder, modified, and full; the primary purpose is as a smoothbore slug gun using Brenneke/Kent 1 oz K-O slugs; other purposes will include home defense, small game hunting, sabot slug gun (need to get a rifled choke), recreational trap gun (remove rear sight insert from ramp & use front sight); I am looking to get a Bagmaster buttcuff shell sleeve so I can keep extra shells on the gun (the Bagmaster brand is velcro adjustable and offers a tighter fit than elastic or neoprene slip-on types);
Even a basic Remington 870 Express setup with 26" or 28" barrel with modified choke and bead front sight can become a multipurpose platform...ideas
sling...get the sling that has the new magazine cap built in that slides on the buttstock;
improved sights...get the slip-on type or screw-on type of hi viz sights that give you a front and rear to aim better for slugs/turkey loads;
chokes...many brands and configurations to choose from; you determine your needs by your imtended purposes;
many, many, many accessories for a very versatile platform...good luck and have fun!