I'm really new to this but can already feel it's becoming a bit of an obsession, perhaps I should stop now before it's too late .... and OMG how bendy were they!

I have minimalist leanings as well; but I have a fairly large collection of yoga stuff:
Props: 6 blocks (two I use at my computer desk because my legs are short), 4 straps, 8 blankets, 2 dowels, 2 backless chairs, 2 sandbags, a meditation bench, a rope, too many mats*, and a backbender (a fairly expensive piece of equipment, see here: http://store.yogamartusa.com/backbender-large-dwi-pada-viparita-dandasana-bench/ - I found mine on craigslist). I don't have a rope wall yet. If you look at my profile pic, you will see one in the background.

I still have the same yoga pants from 8 years ago and I wear them every day - I wish my jeans lasted this long! I have about 7 pairs (company stopped making them and I can't find any like it - they are a lot looser than most I try on, but still form fitting)

I have a shelf and a half of yoga books, some I've read all the way through, some I mean to read.

I spend a good deal of money on yoga workshops & training. I'm going to one this weekend - 2 hours tonight, 5 hours tomorrow, 2.5 on Sunday is the regular schedule for these. Cost is usually around $200 per weekend. I go to at least 6 a year. My husband does many of them too. I'll spend $500 on teacher training this year - I already have a 500h training, this money is for extra teacher's practices and testing fees (I'm going up for Iyengar yoga certification).

So it's only downhill from here

*never throw away old mats - they are great around the house: I have one in my trunk to stop the groceries from sliding around. You can cut them up and use them on top of blocks to keep your hands from sliding. They will also catch cat litter. Here are some more:
http://life.gaiam.com/article/50-ways-reuse-your-yoga-or-fitness-mat