Yeah The G25 and G27 are very similar, I do think the G27 is better than the G25 but as i said they are very similar and if he is saying that the G25 is pretty much brand new, thats a great deal to get. If you have a couple extra dollars, as i said in my last post i highly recommend the GTEYE Springs. Basically what they are is the stock springs in pretty much any pedal set feels very floppy and you can barely touch the pedals and your already flooring it. With these springs it gives it compression so you gotta Push the pedals down, takes some time to get used to it but its so worth it. Its so much easier to manage the throttle, and brake.
Overall, I do think the G25 Wheel and Pedal set will do great for you! Sounds like a good deal.
As of the G29, Yeah the price of the wheel is way too much, In my personal Opinion I believe the reason why the G29 has bad reviews, is 1, the price and secondly, its very similar to the G27, however the minor differences are huge, It has a strong motor in the wheel, and the pedals are better. the quality is very good. Plus Logitech has a reputation of long lasting products. The fact that this wheel is also compatiable with Ps4 also is very nice so I can switch between consoles anytime.
Again that's just my opinion about the G29. Price is still way too expensive. Most G27 users expected more which is what led it too bad reviews because they didn't get what they were expecting.