A similar engine with no headlight would be a 1201 engine.
Box is off white? Never seen an off white set box. All set boxes that I know of are brown cardboard.
Crackle Green? That can only mean that the lithograph has alligatored, as the colors of a lithographed car should be solid colors, but some of the earlier sets do alligator and get an appearance of having cracks.
If the price is $100 and the engine is in pieces, it sounds like it may be priced a bit on the high side, but without pictures I can't really say. I know that boxed sets similar to what you have described, should sell in the $100 to $150 range.