welcome we_dye, if need any help or have questions feel free to contact me/yardgames/amigo22.
I guess the price I'd pay depends on what is included on the discs. If they only have the episodes on them, I'd probably pay $175 (approx $25 for each season) for a box set of the entire series.
However, if they released a box set full of extra features, out takes and behind the scenes stuff, and alternative endings - never before seen stuff, then I'd be willing to pay more than double that amount. If only there were more DVD releases.