There hasn't been much activity in this area. A large portion of our inventory features construction equipment so I may start posting a few items to try and generate some conversation.
One of the big manufacturers in the construction market is Norscot. They primarily make Caterpillar replicas. The bulk of the models are 1:50 scale with some of the smaller pieces of equipment coming in 1:32 an 1:25. Prices on most of these aren't to bad with a lot of the models available for around $30-$40. Some of the larger collector pieces can be from $60-$80.
Here is a sample.
Norscot Caterpillar 14M Motor Grader 55189 (1:50)
Norscot Caterpillar 330D L Hydraulic Excavator w/Metal Tracks 55199 (1:50)
The last two are some of the pricier Norscot pieces. Both of these are large models.
Norscot Caterpillar 793D Mining Truck with Metal Railings 55174 (1:50)
Norscot Caterpillar 994F Wheel Loader Collector Edition (1:50)
Thanks
Ronnie