Altho there might be bargains out there, I've found you get what you pay for after finding some used but refurbishable made in USA Swanstrom cutters on eBay. They have an adjustable screw closure stop to prevent edge dulling clash and are harder steel than cheapies.
With larger sprues its possible to make several point nips to create a more curved cut rather than a single straight edge cut. Then the ruff spots of the sprue scar can be smoothed out by squeeze-drag shaving with a flush cutter. I use a diamond hone to sharpen the cutter edges as needed.
I actually use three types - big and small bevel edge cutters for sprue & removal and a flush cutter for smooth contouring sprue scars. A single flush cutter could work for all tasks including flash removal, but multi tasking might wear the cutting edges quicker.
The shavings are collected with slag skim for remelting & flame fluxing to extract any usable metal.