For deer at 200yrds, a 3-9x40mm scope will treat you just fine. You don't need precision aiming where you can zoom in to read the fine print, you just need to be able to make out the shoulder and the rib line, and place your shot.

The greatest downside I see for lower magnification scopes is that they're often coupled with smaller objectives. Field of View (FOV) is a huge differentiator to me - a smaller objective takes away some of the advantage of a lower magnification zoom; meaning that zooming out lets you see more, but making the window smaller lets you see less. There are also far less options (more now than ever, but still less) for this type of scope.

So again, a 3-9x40mm would be my recommendation. Only shooting 200yrds at deer, you can save some money and skip the side focus or adjustable objective features, and get higher quality optics without as many bells and whistles - yes, you'll be vulnerable to parallax errors, but no, you won't miss deer because of it.

Leupold, Bushnell, or Nikon in the $250-300 price range will treat you well. Bushnell Elite 3200's might be just above that, but are worth it. Bushnell Banner's are solid scopes too, for less cost. Nikon Buckmasters are discontinued, but the Prostaff 5's that replaced them are solid scopes. I would save up a bit to buy a VX-1 or VX-2 over a Leupold Rifleman, but the RM's are good scopes.