>>7052903MPP10 is 12" tall and goes for about $70 average from China. Maybe $100 shipped from the US if you're lucky to find one with the BB7 upgrade kit but don't pay that for just the toy to get it a week faster. Most US sellers of 3P/KO overcharge too much. The trailer is sold separate for about $70 so you can skip it if you wish.
MP10-V is $40 if you want the smaller size.
Straight MP-10 KOs are $120 and have the trailer & roller, but the QC is just low enough to make it not worth it unless you need that specific size. Darker red plastic, that waxy mold release on everything, seems a bit more fragile, the chest will not close flush, and the trailer is a bitch to open. If you're spending that much, just add in an extra $20 and get MPP10 plus the MPP10 trailer.