Just buy a cheap one ,cause sooner or later it will get hung up and you will loose it.
Not if you rig it right. You get a nice big wing anchor, tie the rope to the bottom of it, then take a heavy heavy duty zip tie (like the police handcuff style) and run it through the eye of the anchor and zip tie the rope to it. This way it stays in the up position when anchoring and let's it grab properly. Should it get hung up, you reverse your boat and it breaks the zip tie and pulls the anchor up from the bottom up and will get it unstuck every time.