that is fair price IMHO if you want the fancy shmancy walnut. But for same $299 you can get a two barrel combo with simpler black furniture, on sale from $399, $279 with stupid friggin' $20 rebate (I hate rebates, especially mailin, but also hate in store rebates like this one when they want a bunch of info, just give me the darn price).
Big5 has the combo on sale fairly often, I got mine for $259 with no silly rebate couple years ago. Same 28" field barrel as you are looking at, plus 18.5 security barrel. I like my combo, keep the short barrel on for HD and for multigun matches, use the long barrel for trap and skeet. Absolutely no issues, goes boom every time. Only two possible downsides to consider with this combo:
-the mag is short to allow for 18.5 barrel, 5 rounds - fine for trap, skeet or hunting (some areas need plug for less then 5). Only time I dislike 5 rounds is at multigun - ah well, I need the practice for reloading under the clock

-this 28" cannot be choked (at least not easily) - not an issue for me as I like wide open for lots of challenge, but you need to decide what you want on that subject.
Here is link to sale until Sat 15th (and did I mention the silly rebate?)
Big 5 Sporting Goods - Weekly Ad Specials - MOSSBERG ‘500 SILVER’ 12-GAUGE PUMP SHOTGUN COMBO