Just noticed this board my self. I have to agree w/ Mpire. If I didn't own a 96 Z3 and or a 97 M3 wouldn't be able to own a BMW. Both cars are about as simple as BMWs can get. We don't even have power seats in the M3. With basic tools and a couple of Peake code reader/reset tools I have been able to do 95% of all repairs. I have owned the Z3 since 97 and there is very little I haven't heard about them or found out on my own. I love the Z3, she has 198k miles on her and we driven her to all but 13 states in the lower 48. She's got a Downing Atlanta Super Charger last Christmas and is getting a hardtop this year.
Congrats on your Z3 Don't forget that if you didn't originally order a hardtop with your Z3, you may need a hardtop installation kit to properly mount your hardtop. This is similar to the E36 convertibles being fitted with a hardtop. It's widely available for about $100.
BMW has a great deal on some colors. It comes with cover and mounting kit as a retro fit kit. I paid $1400 w/ taxes for an evergreen top. I'll have to have it painted but better than $3265 for a black one.
Well, the Z3 retrofit kit ... 54219408699 $460.00 However, if you are buying a Hard top second hand, you probably only need the mounting posts, defrost harness, and the bolts for the header. 04 Left hardtop support 1 54218410457 $101.96 04 Right hardtop support 1 54218410458 $101.96 03 Torx bolt M8X18 2 54218410534 $8.51