Easy usenet is having a christmas deal with 50% off the usual prices. You must buy at least 3 months access to get the discount.
Regular plan
3mbps 3month - $10.50, $3.50 per month (was $21)
6mbps 3month - $12.4, $4.10 per month (was $24.7)
12mbps 3month - $17, $5.70 per month (was $34)
30mbps 3month - $20, $6.70 per month (was $40)
'Night plan' (day for us)
30mbps - $9.50 for 3 months, $3.15 per month (was $19)
All accounts are unlimited and have 900 days of retention. Prices are converted from euro at the current exchange rate, so actual prices will be more slightly more expensive based on your cc exchange rate. Good price for a Netherlands provider, especially the night plan. Discounts are even greater for longer terms, up to 2 years. There's a 5 day free trial if you want to test it out.
I personally prefer NewsDemon. Their prices seem much more worth it ($10.61/month) than this and allow for 50 simultaneous connections and unlimited speed. They also have much higher retention.