In addition to my two die-cast Convair 880s are a few kit model examples...
One of the better ones is this Glencoe reissue of the Hawk kit. Quality control at Glencoe is pretty hit or miss though. I've bought several of them only to fine misshapen or missing pieces and since no plastic batch is ever the same it's hard to mix and match and the 1:126 scale is an odd mate with the two 1:144 707s I have. Still better than having nothing and the only 880 kit currently being made.
This Aurora CV-880 is a pretty awful looking model. For no good reason they squared off the fuselage and the nacelles are poory proportioned. For its size there's very little incised detail. It's pretty big though, almost HO guage.
And it has a cool stand....
Last and certainly least is the Lindberg line's awful rendition. The tailfin looks nothing like a real 880 - though it looks like early prototype sketches - and the engine pods are poorly placed. I don't even consider this an 880. I bobbed the wings on mine so it'd look more like a stretched McDonnell 220. I like the results so much I think I'll have a go at trimming the fuselage when I can get another kit. Fortunately this was reissued in Mexico during the 80s and they show up on eBay regularly.