I don't know about the 414M, but I bought my 414M2 about 2 weeks ago, and I paid $259 + shipping.
I just completed building my kit on Saturday, and I must admit that it was actually a plearuse to build. The shocks are simply outstanding in quailty. Tamiya somehow prevented the inside of the shock from becoming anodized, then it looks as if they polished the inside to an almost mirror like finish... very smooth action!!!
I won't get to race my car for at least 4 months, but I'm a little concerned about small stones and debris getting caught under the front and rear diffs. Have any of you guys experienced stuff getting trapped there? Has anyone cut openings under the diffs to allow debris to easily escape?
I did that with my old Yokomo YR4-M2 after having a belt destroyed by a small stone. The track that I race on is very clean, but you know Murphy's Law.