Need a Jacket
Having had a lot of coats, including OEM's, I have now switched all my gear to Klim. It is pricey, no doubt, but I essentially wear 1 base layer, maybe a fleece vest, and my bibs and coat. 100% waterproof (stay DRY in rain), all the zippers you need to cool off and super warm and windproof. Been great gear.
However, if you are looking for gear to "get by", I would second Ken's Sports. They have some pretty amazing deals there. My wife rides with me 1 or 2x's per year and this is where she bought her gear.
Back to Cat Deals clothing. Some coats are cheaper than others, just depends on how many of them they have. I purchased my Arctic Cat Coat for under $100. They must have had way too many of them. According to the sizing chart it had extra long sleeves but it was my size, couldn't tell the difference once it arrived. Looked at the local dealer (Schauer Power) and they had a similar coat for $325.
Also, if you call them, they are really helpful, even with returns.
Go to Cat Deals BT. You'll get a $350 dollar Arctic Cat Jacket for $150 bucks. They are typically overstocks or last years model.
You can't beat a Polaris, Arctic Cat, or Ski Doo snowmobiling jacket.
They are thin, crazy warm, and water resistant. My wife, boys, and I, get all our Arctic Cat stuff from Cat Deals. Cheapest you'll find decent snowmobile clothing.
Try Amazon.com also. Go try on jackets at places and see what size and brand fits you and look it up on Amazon. Could save you a bunch of money!