About 90% is second-hand. I didn't specifically want 10% new - it just happened to be cheap (roughly same price as used). Most has been sourced from eBay or this forum, there being no handy retailers here on the edge of nowhere. I have no particular allegiance brand-wise - currently have LGB, PIKO, Aristo-craft, USA Trains, AMS, Trainline 45 and even Tenmille G (on sidings where a few strokes with a file has resolved the rail-height difference). Most trackwork in brass, but I have a few Aristo 10' diameter stainless steel points and curves. I am a bit of a heathen when it comes to sleeper spacing and have happily mixed Euro with USA. Most joints have rail joiners, but now with a rail-clamp over to be on the safe side conductivity wise. Hopefully that will also help with the expansion gaps that developed between track pieces when the weather was hot. I have an LGB Schoema rail-cleaner, plus a couple of under-wagon jobs, but also use the Poundland spongy sanding blocks for stubborn areas. If anyone needs to dismantle points etc for servicing a soak in a solution of white wine vinegar and salt removes tarnish, BUT be warned it removes zinc from the brass surface leaving a surfeit of copper and the rail will take on a pinkish hue until it weathers. I had a large quantity of surplus R1s of various makes and re-radiused (?) to whatever was required as well as conversion to straights. Had a few issues with feeds (jumpers) on point-work (new and s/h and all makes) and have replaced whenever necessary. Rail-end joints on points are strictly rail-clamps only now, to allow removal without disturbing surrounding track. I've built up a reserve of spare track for possible future use - probably over 300ft, plus 20 or so points and crossovers.