New all the way !
Some NOS ramps can be up to 20 years old and even without noticing have slightly yellowed and a great deal thinner and inferior than repro ramps....
Most plastics turn brittle with age. I have purchased 6 ramps from Greg, all repro/new, and all have been superior to the originals. Thicker stronger and weak points have been rectified....
If its new and available i suggest you visit RTBB...
