$199 - Vortex Crossfire - easy to find, lifetime warranty, consistently cheap, great glass, lacks some modern red dot features (No shake awake or push buttons).
$179-250 - Sig Romeo 5 - Best feature set, only $179 at cabelas on sale (no low mount on cabelas package, other retailers include it for ~$250), best glass in price range imo, only 5 year warranty for electrical components from Sig.
$250 - Holosun HS403B - overall same description to the Sig Romeo 5 but with lower profile battery tray. 5 year electrical warranty.
$199 - Primary Arms MD-25 - Larger window than other micro red dots. Shake awake with rotary knob. Lifetime warranty. Cheap price for a unique red dot.
$250 - Primary Arms MD-20 - Once again same description to the Holosun/Sig. Only low mount. Lifetime warranty.
$300-350 - Primary Arms 1x Micropirsm - Fills the role of a red dot. Better for people with astigmatism. Etched reticle usable without battery. Lifetime warranty. Shake awake. Might not work with a magnifier for some (didn't for me) with ####ty eyesight. One of the cheaper ways to get a circle dot/horseshoe reticle.